<template>
 <div>
   <nav-bar>
     <div slot="left" class="back" @click="backClick">
       <img src="~assets/img/common/back.svg" alt="">
     </div>
     <div slot="center" class="title">
       <div v-for="(item,index) in titles"
            class="title-item" :class="{ active: index === currentIndex}"
            @click="titleClick(index)">
         {{item}}
       </div>
     </div>
   </nav-bar>
 </div>
</template>

<script>
  import NavBar from "components/common/navbar/NavBar";

  export default {
    name: "DetailNavbar",
    components: {
      NavBar
    },
    data(){
      return {
        titles: ['商品','参数','评论','推荐'],
        currentIndex: 0
      }
    },
    methods:{
      titleClick(index){
        this.currentIndex = index
        this.$emit('titleClick',index)
      },
      backClick(){
        // this.$router.back()
        this.$router.go(-1)
      }
    }
  }
</script>

<style scoped>
.title{
  display: flex;
  font-size: 13px;
}
.title-item{
  flex: 1;
}
.active {
  color: var(--color-high-text);
}
.back img{
  margin-top: 12px;
}
</style>
